Dragon Knight of Creation

Increase this card's Level by 4 during your opponent's turn only. When this card destroys an opponent's monster by battle and sends it to the GY: You can send 1 Level 7 or 8 Dragon monster from your Deck to the GY. You can send 1 card from your hand to the GY, then target 1 Level 7 or 8 Dragon monster in your GY; send this card to the GY, and if you do, Special Summon that monster. You can only use this effect of "Dragon Knight of Creation" once per turn.